Antihalation backing
A dye used on the back of the majority films capable of absorbing light which passes straight through the emulsion.
Anti-halation
Techniques Glossary Anti-halation
A light-absorbing dye thats present in the film to prevent reflections and light spread that would create a halo around bright highlights. The dye disappears during processing.
HALATION - Blurred effect at the edges of a highlight area of a photograph caused by reflection of light that passed through the film. The light is reflected from either the surface of the film or the camera back.
halation
(1) blurring or spreading of light on a photographic positive or negative, diffusing image detail; (2) the scattering of exposing light rays reflected off screen mesh threads, thereby affecting resolution of the stencil image.
Halation A phenomenon that arises when light scattered within the film emulsion continues through the film base and is reflected. Halftone A reproduction of an image through a special screen.
Halation - fog or halo around brilliantly lighted objects. A similar affect is called Chromatic Aberration. These effects are caused when you shoot a subject that is strongly back lit. All lenses can have this problem...
Halation.
The production of "halos" round bright spots in an image, by light reflecting from the back of the film-base. General film bases are given a light absorbing coat the anti-halation back to prevent this.
Hi 8 ...
-Halation - diffused ring of light typically formed around small brilliant highlight areas in the subject. It is caused by light passing straight through the emulsion and being reflected back by the film base on the light sensitive layer.
The anti-halation layer is a light-absorbing coating on the back of the film which prevents halos from forming in the image by absorbing light which may otherwise bounce back up into the silver layer.
They are as follows: overcoating, antihalation backing, and noncurl coating (fig. 2-2). The purpose of the five parts of photographic film are as follows: 1.
Below the base is an undercoat called the antihalation backing, which usually contains absorber dyes or a thin layer of silver or carbon (called rem-jet on color negative stocks).
It's not only the silt on the deck that becomes problematic, but also overhead sediment that rains down with every exhalation bubble while you work inside the wheelhouse or interior compartment.
There's another problem that can come into play when using Kodak HIE and any other film which lacks an anti-halation layer. Many cameras, EOS or not, have a cutout hole in the camera back's pressure plate.
Next, try not to take the shot during your inhalation or exhalation as your entire body is moving up and down during this process. Take the shot after the breath.
As it is development at the surface, there is less halation and irradiation, and the best possible rendering of sharpness
Great economy and cheapness of the solutions ...
These problems might include some of the following: light dispersion in the film emulsion during exposure, halation (light reflected back from the film pressure plate from bright areas in the image), ...
A distortion of image quality or color rendition within a photographic image caused by optical limitations of the lens used to produce the image. Aberrations commonly show up in the form of halation around contrasty portions of the image and/or ...
Beyond that the corners get progressively softer, with a drop in contrast and visible smearing due to halation. The corners progressively improve on stopping down; at F4 they're critically sharp.
If you have two clips that have you taking a breath, it will sound odd to have two rapid inhalation sounds in rapid succession. As you edit, be aware of these things and make adjustments accordingly.
 See also: Photograph, Image, Light, Camera, Photography
  
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